The document describes a study on implementing a wind farm reactive power coordination scheme using IEC 61850 GOOSE messaging. A centralized wind farm controller was modeled in real-time on an OPAL-RT simulator to regulate the voltage at the point of common coupling by dispatching reactive power setpoints to each wind turbine generator based on its reactive power capability. The simulation results demonstrated that the wind farm was able to maintain the voltage within the required range under both unity power factor and reactive power coordination control modes using GOOSE messaging for real-time communication between the controller and wind turbine generators.

1. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
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Shijia Li
MEng. Candidate, Department of ECE, McGill University
Supervisor: Prof. Geza Joos
Email: shijia.li@mail.mcgill.ca
Wind Farm Reactive Power Coordination Scheme
Using IEC 61850

2. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
Outline
IEC 61850 and GOOSE messaging
Case study – Wind farm controller
 Configuration
 Tools
 Results
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3. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
IEC 61850
Overview & Benefits
 Substation Automation Systems (SAS)
 Defines the communication between
intelligent electronic devices (IEDs).
 Benefits
 Multi-vendor interoperability
 Low cost (installation and commissioning)
 Free configuration
Source: Special report IEC 61850—ABB Group 3

4. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
GOOSE Message
 GOOSE message
 Time-critical activities
communication between IEDs
 Multicasting
 Publisher/subscriber mechanism
Source: IEC 61850-7-1
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5. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
Publisher/Subscriber
 SCL file
 Substation Configuration Language
 IED configurations and communications
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OPAL-RT GOOSE message blocks

6. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
Outline
IEC 61850 and GOOSE messaging
Case study – Wind farm controller
 Configuration
 Tools
 Results
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7. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
System Configuration
 Centralized wind farm control
 Utility grid code:E.12-01
 PCC voltage (±6%)
 Implement IEC 61850 protocol
 Communication between WTG and wind
farm controller
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System configuration

8. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
Wind Farm Reactive
Power Coordination
 Centralized wind farm control
 Voltage regulation at PCC
 Q dispatch based on reactive power
capability for each WTG
 Send/receive information using IEC
61850 GOOSE
 Q set points for each WTG
 Q capability from each WTG
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Wind farm reactive power coordination scheme

9. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
Tools
 Hardware
 OPAL-RT simulator
 Network switch, cables
 Laptop
 Software
 Modeling
• Matlab Simulink, RT-LAB
 SCL file configuration
• ICD designer, XML marker
 Network protocol analyzer
• Wireshark
Real-time simulation setup for wind farm reactive power coordination scheme
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10. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
Real-Time Simulation Model
Network
Console
WTG1
WTG2
WTG3
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Console
WTG1
WTG2
WTG3
Network

11. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
Troubleshooting
 Wireshark
 Packet analyzer
 Used to capture and analyze
GOOSE packets
 Decoding
 Destination address
 Data set
 Data attribute
 Data value
Data set
Data
attributes
and values
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12. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
Simulation Results
100 200 300 400 500 600
-0.4
-0.3
-0.2
100 200 300 400 500 600
-0.4
-0.3
-0.2
100 200 300 400 500 600
-0.4
-0.3
-0.2
Time (s)ReactivepoweratWTG(pu)
WTG 1
WTG 2
WTG 3
 Control mode
 Unity power factor
 Reactive power coordination
100 200 300 400 500 600
1
1.05
1.1
Time (s)
RMSvoltageatPCC(pu)
Unity Power Factor
Voltage Control
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RMS voltage at PCC (pu)
Reactive power at WTG (pu)

13. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
Conclusion and Future work
 Conclusion
 OPAL-RT simulators allow for the testing of IEC 61850 GOOSE
messaging.
 Wind farm control strategy successfully implemented
employing IEC 61850 GOOSE messaging.
 Future work
 Agent-based decentralized controller
 Other distributed energy resources
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14. The 7th International Conference
on Real-Time Simulation Technologies
Montreal | 9-12 June, 2014
Q & A
Thank you!
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